Update README.md with snapshot info (#9636)

* Update README.md

* spacing fix

* Added build.gradle root folder code

* added make aproj instructions

* snapshot info tweak

* text reorder

* small tweak

platform/android/README.md

@@ -14,6 +14,36 @@ Alright. So, actually, you may be in the wrong place. From here on in, this READ
 
 [![](https://www.mapbox.com/android-sdk/images/splash.png)](https://www.mapbox.com/android-sdk/)
 
+#### Opening the project in Android Studio
+
+We recommend that you open this repository's `android` folder in Android Studio. 
+
+mapbox-gl-native > platform > android
+
+Once you open it in Android Studio and switch to the Android view in the left-hand sidebar,  you should see the `MapboxGLAndroidSDK` and `MapboxGLAndroidSDKTestApp` folders.
+
+Alternatively, you can use the Terminal application to open the project in Android Studio. Open your Terminal application, navigate to this repository's root folder, and run the `make aproj` command.
+
+#### Using the SDK snapshot
+
+Instead of using the latest stable release of the Mapbox Android SDK, you can use a "snapshot" or the beta version if there is one available. Our snapshots are built every time a Github pull request adds code to this repository's `master` branch. If you'd like to use a snapshot build, your Android project's gradle file should have -SNAPSHOT appended to the SDK version number. For example `5.2.0-SNAPSHOT` or:
+
+```java
+// Mapbox SDK dependency
+    compile('com.mapbox.mapboxsdk:mapbox-android-sdk:5.2.0-SNAPSHOT@aar') {
+    transitive = true
+    }
+```
+You need to have the section below in your build.gradle root folder to be able to resolve the SNAPSHOT dependencies:
+```
+allprojects {
+    repositories {
+        jcenter()
+        maven { url "http://oss.sonatype.org/content/repositories/snapshots/" }
+    }
+}
+```
+
 ### Setup environment
 
 **These instructions are for developers interested in making code-level contributions to the SDK itself. If you instead want to use the SDK in your app, see above.**
@@ -64,8 +94,6 @@ $ sudo apt-get install -y build-essential curl lib32stdc++6 lib32z1 pkg-config p
 - [xcpretty](https://github.com/supermarin/xcpretty) (`gem install xcpretty`)
 
 
-#### Open project in Android Studio
-
 ##### macOS
 
 Execute the following to generate the required build files and open the project with Android Studio: